冲洗程序对饮用水生物稳定性和分配系统中侵入易感性的影响
Fien Waegenaar1,2, Thomas Pluym1,2, Elise Vermeulen1,2
1Center for Microbial Ecology and Technology (CMET), Department of Biotechnology, Ghent University, Ghent, Belgium.
Applied and environmental microbiology
|May 13, 2025
概括
传统的饮用水冲洗,特别是用,可以促进微生物的再生. 虽然它加速了有害细菌的死亡,但它也影响了水的生物稳定性和系统弹性.
科学领域:
- 水的质量和水处理.
- 环境微生物学环境微生物学
- 公共卫生 公共卫生
背景情况:
- 饮用水质量问题,如气味和污染,是持续存在的挑战.
- 传统的冲洗是解决这些问题的常见但不太了解的方法.
- 冲洗可以对水的生物稳定性产生负面影响,并增加微生物入侵风险.
研究的目的:
- 评估传统冲洗 (含有或不含) 对饮用水配送系统微生物生物稳定性的影响.
- 了解冲洗如何影响微生物的再生和对细菌入侵的易感性.
- 为优化冲洗程序和增强配送系统弹性提供见解.
主要方法:
- 使用了一个试点规模的饮用水分配系统,其中有三个PVC环.
- 一个循环经历了化冲洗,另一个经历了非化冲洗,一个控制循环仍然没有冲洗.
- 生物稳定性使用流细胞计进行监测,并使用特定的细菌指标测试侵入易感性.
主要成果:
- 化冲洗显著促进了寄居细菌的再生,主要是 * Sphingopyxis * spp.
- 在所有测试条件下,生物膜细胞密度保持稳定.
- 引入的细菌指标在化循环中衰变得更快,这表明微生物竞争增加.
结论:
- 化冲洗促进了居民微生物的再生,同时加速了引入的细菌指标的衰变.
- 冲洗策略涉及控制不必要的细菌和保持系统微生物稳定性之间的权衡.
- 这些发现对于完善冲洗方案至关重要,以确保安全饮用水和弹性分配系统.
更多相关视频
09:21Methods for Characterizing the Co-development of Biofilm and Habitat Heterogeneity
Published on: March 11, 2015
9.9K
12:11A Modified EPA Method 1623 that Uses Tangential Flow Hollow-fiber Ultrafiltration and Heat Dissociation Steps to Detect Waterborne Cryptosporidium and Giardia spp.
Published on: July 9, 2012
20.3K
相关概念视频
04:01Factors Affecting Solubility
32.9K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
32.9K
01:20Factors Affecting Dissolution: Drug Permeability, Stability and Stereochemistry
156
Orally administered drugs primarily enter the systemic circulation via passive diffusion through the intestinal membranes. The drug's absorption is influenced by drug stability in the gastrointestinal GI tract, membrane permeability, the surface area available for absorption, luminal drug concentration, and residence time in the lumen. Drug permeability can be enhanced by adjusting the lipophilicity, polarity, or molecular size of the drug, promoting its passive transport across intestinal...
156
01:25Design Example: Designing a Residential Plumbing System
160
The design of residential plumbing systems requires carefully evaluating water demand, flow rates, and pressure dynamics to ensure both efficiency and reliability. The nature of water flow within pipes is defined by its Reynolds number, which classifies flow as either laminar (smooth) or turbulent.
160